江苏长江岸线生态修复评价指标体系的应用

Application of the evaluation index system for ecological remediation of the Yangtze River shoreline in Jiangsu Province

基于江苏长江岸线生态修复评价指标体系,明确水土保持度中各项影响因子的计算方法。采用层次分析法分别确定水土保持度指标中各因子及评价体系中各指标的权重。补充生态指数的计算方法并明确对应的赋分等级,提出开展评价的时间节点,形成一套可用于江苏长江岸线生态修复的评价体系。以南通五山段长江岸线为例,开展该体系的应用研究。结果表明:1)2018—2020年,使用评价指标体系计算得到的生态指数逐年增大,最大增长率为90.09%。2)生态效果由修复工程建设初期的较差逐步提升为优秀。3)在已实施生态修复的岸线,应用该评价体系得到的生态效果评价与该岸线实际工程进度、生态变化情况相符,验证了江苏长江岸线生态修复评价指标体系的科学性与适用性,可推广应用于江苏其他岸线生态修复评价。

Based on the evaluation index system for ecological remediation of the Yangtze River shoreline in Jiangsu Province,the calculation methods of various influencing factors in the soil water impact index(SWII)are further refined.The analytic hierarchy process(AHP)is used to calculate the weight of each factor in the SWII.Similarly,the weight of each parameter in the evaluation index system is also calculated by the AHP.The calculation method of ecological index(EI)is supplemented,and the corresponding ecological effect levels of different EI values are determined.The suggestions on the time node of evaluation are proposed to form a set of evaluation system that can be used for ecological remediation evaluation of the Yangtze River shoreline in Jiangsu Province.To investigate the application of the evaluation index system,a case study in shoreline of Wushan section,Nantong City,Jiangsu Province is carried out.The results show that:1)From 2018 to 2020,the values of EI calculated by the evaluation index system have increased year by year,and the maximum growth rate of ecological index is 90.09%.2)The ecological effect changes from poor to excellent.3)The evaluation index system is applied to the shoreline for ecological remediation,and the obtained ecological evaluation is consistent with the real project progress and ecological changes of the shoreline,which verifies the scientificity and applicability of the evaluation index system for ecological remediation of the Yangtze River shoreline in Jiangsu Province.It is recommended to be used in the ecological remediation evaluation of other shorelines in Jiangsu Province.